Traveling electric fan



S. RADIMAK TRAVELING ELECTRIC FAN Filed Nov. 4, 1923 gmvewtoz Patented July. 22, 1924.

STATES PATENT OFFlCE.

STEVEN BADIKAK, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF 'I'O DAVID SCHIFFER, OF NEW YORK, N. Y.

TRAVELING ELECTRIC FAN.

Application filed November 4, 1922. Serial No. 599,114.

To all whom it may oonoem:

Be it known that I, STEVEN RADIMAK, a citizen of Hungary, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Traveling Electric Fans, of which the following is a specification.

This invention relates to a traveling fan which is moved around the room in which it is located by the engagement of its blades with the air, the invention having for a general object to provide a traveling fan of this type.

A further specific object of the invention is to provide for variation of the pitch of the fan blades and the force of the blast of air.

For further comprehension of the invention, and of the objects and advantages thereof reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth. I

Fig. 1 of the drawings is a side view of my improved fan showing it suspended from an overhead track.

Fig. 2 is a transverse section on the line 2-201? Fig. 1. v

Fig. 3 is a fragmentary longitudinal vertical sectional view showing the means for varying the pitch of the fan blades.

Fig. 4 is a detail horizontal sectional view taken on the line 4-4 of Fig. 3.

Referring now to the drawings the reference numer 1 10 indicates an electric motor of ordinary! construction to the top of which a plate 11 is fixed. This plate 11 has at one end upstanding hinge ears 12 engaged with depending hingeears 13 on a second plate 14 extending horizontally above the motor and spaced a distance above the plate 11. To the opposite ends of the plates 11 and 14 to those just referred to are pivotally attached the rods 15 and 16 which are respectively right and left hand screwthreaded and are engaged by a turnbuckle 17, by turning which the axis of motor 10 maybe inclined as may be desired.

The plate 14 is suspended from the lower end of two pairs of vertical straps comprising a front pair of 20 and a rear pair 21 the former of'w the other is connected thereto as will be presich is fixed to the plate 14 while ently set forth in a manner to permit of the straps rotating around a vertical axis on the plate. These straps have suitably journaled 1n the upper ends thereof the rollers 22 which ride on a pair of rails23 suitably suspended. from the ceiling, as indicated at 24 in Fig. 2.

The shaft of the motor 10 is shown at 30 and has a fan mounted on each end thereof, the blades 31 of these fans being adjustable to vary their pitch. To this end the blades are fixed on radial pintles 32 journaled in cylindrical heads 33 formed on opposite ends of the shaft 30, these pintles having short arms 34 fixed to their inner ends. The shaft 30 is made hollow from end to end and extending freely therethrough is a rod 35 having a disk 36- on each end, these disks having radially projecting pins adapted to engage in oblique slots 38 in the arms 34 whereby, on moving the rod 35 longitudinally, the pitch of the blades 31 is varied.

The rod 35 is moved longitudinally by a bell crank lever 42 suitably fulcrumed on the motor 10 and having one end engaging in a circumferential groove 43 in a ring 44 freely surrounding the shaft 30. This ring 44 is rigidly connected to the rod 35 by means of spoke elements 45 which pass through longitudinal slots 46 in the shaft 30.

When a-strong blast of air is desired the device requires braking so as not to travel at high speed on the rails, the braking means being preferably automatically tightened and oosened as the pitch of the fan blades is increased and decreased.

The braking device comprises a pair of arms such as 50 pivoted atone end to the straps 20 and extending rearwardly therefrom over the rails 23 and having brake shoes 51 mounted on their lower sides adapted to bear on said rails. The free ends of these arms 50 are united by a transverse rod 52 to which is connected, midway between its ends, the upper end of a screw 53 whose lower end is connected by a turnbuckle 54 with the upper end of a screw 55 connected at its lower end to the other end of the bell crank lever 42, against which latter a spring 56, fixed to the underside of plate 14, bears downwardly. The plate 14 is longitudinally slotted as at 57 to accommodate the screw iBy tightening or loosening the turnbuckle pitch of the blades 31, while, as will be apparent, the pressure of spring 56 on the lever 42 will likewise vary as the latter is adjust-' ed, with a consequent variation of the pressure of the brake shoes 51 on the rails. The various parts, of course, are so arranged that when the fan blades are at a high pitch the braking action is strongest.

Current to the motor may be supplied through the rails 23, rollers 22 and straps 21, the latter being here shown as mounted on opposite ends of an insulating bar 60 pivoted on the plate 14 by a king-bolt 61. A lamp 62 may be mounted on one of the straps .21.

Having thus described my invention what I claim as new and desire to protect by Let- {ers Patent of the United Stat s is as folows:

1. In combination, a'motor, a fan having helical blades driven by said motor and.

adapted to propel the latter along a track, a

brake for retarding the travel of the motor along the track, and a unitary means for adjusting said brake and varying the pitch of the fan blades.

2. In combination, a rail, a motor suspended therefrom, a brake adapted to engage said rail, a fan having helical blades driven by said motor, and a unitary means for adjusting said brake and varying the pitch of the fan blades.

3. In combination, a rail, an electric motor suspended therefrom, a hollow motor shaft, a head thereon, fan blades pivoted on said head to permit of variation of their pitch, a rod shdable' in said head and connected to said blades to vary the pitch there of, a ring surrounding said shaft and rigidly connected to said rod, a lever engaged with said ring to move the same longitudinally ofsaid shaft, and a brake adapted to engage said .rail and-to .be operated in unison With-said lever.

4. In combination, 'a rail, an electric motor suspended therefrom, a hollow motor shaft, 2. head thereon, fan blades pivoted on said head to permit of variation of their pitch, a rod slidable in said head and connected to said blades to vary the pitch thereof, a ring surrounding said shaft and rigidly connected to said rod, a lever engaged with said ring to move the same longitudinallyof said shaft, and a brake adapted to engage said rail and to be operatedin'unison with said lever, the operating meansfor said brake and lever comprising a pair of screws, and a turnbuckle engaged therewith.

In testimony whereof I have aflixed my signature.

STEVEN RADIMAK. 

